| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 33 | 112 |
| 2015 | 35 | 132 |
| 2014 | 43 | 132 |
| 2013 | 43 | 133 |
| 2012 | 39 | 135 |
| 2011 | 40 | 131 |
| 2010 | 36 | 131 |
| 2009 | 35 | 129 |
| 2008 | 34 | 130 |
| 2007 | 29 | 133 |
| 2006 | 24 | 131 |
| 2005 | 23 | 130 |
| 2004 | 13 | 141 |
| 2003 | 11 | 137 |
| 2002 | 9 | 137 |
| 2001 | 7 | 136 |
| 2000 | 6 | 140 |
| 1999 | 7 | 135 |
| 1998 | 8 | 134 |
| 1997 | 7 | 135 |
| 1996 | 7 | 132 |
| 1995 | 7 | 130 |
| 1994 | 6 | 114 |
| 1993 | 8 | 108 |
| 1992 | 9 | 103 |
| 1991 | 9 | 106 |
| 1990 | 9 | 104 |
| 1989 | 7 | 90 |
| 1988 | 7 | 89 |
| 1987 | 6 | 90 |
| 1986 | 5 | 86 |